Four dead in California carjacking spree

Authorities in Southern California are searching for a motive after a student went on a carjacking and shooting spree, killing one woman, 20, in his home, before killing two more and himself. NBC’s Miguel Almaguer reports.

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>>>people are dead in a series of shootings and car jackings in
southern california
. nbc's miguel almaguer have the latest as police continue to search for a motive.

>> reporter: the
shooting spree
began inside this
suburban home
an hour outside of
los angeles
. police say 20-year-old ali
sayed
gunned down a woman in her 20s as his parents slept upstairs tuesday morning.

>>what the woman was doing inside his home is still under investigation and not known at this time.

>> reporter: the
suspect fled the scene
, armed with a shotgun.
sayed
then carjacked a man in a truck, uttering a few chilling words before letting him go.

>>he did approach him and say something to the effect of i killed somebody. today's my last day.

>> reporter: just down the highway,
sayed
is said to have opened fire on multiple drivers before a second deadly carjacking also in
orange county
. detectives say 69-year-old melvin ed war wards was orred out of his bmw and then executed.

>>there's no indication of a motive. there's no connection to a conspiracy.

>> reporter: with the suspect on the run, police say
sayed
shot and killed 26-year-old jeremy lewis in a utility truck. his third carjacking. with police closing in on
sayed
, investigators say he jumped out of his
stolen car
and took his own life with the same shotgun he used to kill three others. miguel almaguer, nbc